技術標籤：java常見基礎問題java

## 標題java小數累加問題
**BigDecimal count = new BigDecimal(0);**
		List<OrderInfo> infoList = new ArrayList<OrderInfo>();
		for (int i = 0; i < list.size(); i++) {
			BigDecimal priceDouble = new BigDecimal(price);
			BigDecimal numDouble = new BigDecimal(num);
			BigDecimal multiply = priceDouble.multiply(numDouble);// 相乘
			**count = count.add(multiply);//累加**
		}
		order.setPayment(count.toEngineeringString());